With the help of this primitive tester https://chromium-review.googlesource.com/415305, I pushed all refs with younger than 3 month old commit at their HEADs with *validator enabled*. I think it's fine to add it to production.

PSA to webrtc-eng sent http://g/webrtc-eng/UYSz8iiv87o/XGXrP0s_AgAJ

For WebRTC admins: to disable validation quickly, add
 refs/*
to disable "Disable validation on refs" in https://chromium-review.googlesource.com/#/admin/projects/external/webrtc
(see screenshot attachment). 

Deleted: Screenshot from 2016-12-01 15:47:52.png 8.3 KB

	Screenshot from 2016-12-01 15:47:52.png 8.3 KB View Download

CQ whitespace https://codereview.webrtc.org/2547543002/

manual git cl land whitespace https://codereview.webrtc.org/2547553002

Temporary made myself a committer.

Enabled validation on refs/head/master and refs/branch-heads/*
https://chromium.googlesource.com/external/webrtc/+/fd5e77acfd42b7d86e43363d98c2c247a2084b26%5E%21/#F0

Landed manually with git cl -> ok.
Landed with CQ -> OK.
git-drover on branch-heads/56 -> OK.

Removed myself from committers -> on CIA and in Gerrit.

I consider this a success so far :)